Our team has found two Twitter applications that allow you to tweet music files (MP3). Songly lets you submit a link to an mp3 file, shortens it for you and lets them play it right in the browser. Songly also comes as a Firefox add-on.

TwittyTunes is a Firefox add-on from FoxyTunes that not only lets you share music, but websites and videos as well.

When people on Twitter reply to you (by using the @yourname in their post), you cannot see those posts on the website unless you click on the “@Replies” bar on the right side of your Home page. That problem is now solved with Twply.

Twply will forward all your @Replies to your email inbox (the same email that you registered with Twitter). While it does solve one problem, you may end up with a full inbox if you are exceptionally prolific on Twitter.

Update: Twply has just been sold for $1,200 because their servers could not keep up with the number of people using the service. We will keep you updated on this.